GCF vs. LCM
Presentation
•
Mathematics
•
5th Grade
•
Practice Problem
•
Medium
Michael Simonelli
Used 165+ times
FREE Resource
9 Slides • 4 Questions
1
How can you tell if a word problem requires you to use Greatest Common Factor or Least Common Multiple to solve?
2
What do I know?
What do I need to know?
What is my plan?
3
to split things into smaller sections
to equally distribute 2 or more sets of items into their largest grouping
to arrange something into rows or groups
4
about an event that is or will be repeating over and over.
to purchase or get multiple items in order to have enough.
to figure out when something will happen again at the same time.
5
Multiple Choice
Example 1
Samantha has two pieces of cloth. One piece is 72 inches wide and the other piece is 90 inches wide. She wants to cut both pieces into strips of equal width that are as wide as possible. How wide should she cut the strips?
Is this a GCF word problem or an LCM word problem?
GCF
LCM
6
7
Fill in the Blanks
Example 1
Samantha has two pieces of cloth. One piece is 72 inches wide and the other piece is 90 inches wide. She wants to cut both pieces into strips of equal width that are as wide as possible. How wide should she cut the strips?
Type your answer as:
Type answer...
8
9
Multiple Choice
Example 2
Ben exercises every 12 days and Isabel every 8 days. Ben and Isabel both exercised today. How many days will it be until they exercise together again?
Is this a GCF word problem or an LCM word problem? Be ready to explain why!
GCF
LCM
10
11
Fill in the Blanks
Example 2
Ben exercises every 12 days and Isabel every 8 days. Ben and Isabel both exercised today. How many days will it be until they exercise together again?
Type your answer as:
Type answer...
12
13
How can you tell if a word problem requires you to use Greatest Common Factor or Least Common Multiple to solve?
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